KUYOU Skate Helmet Adjust Size Multi-Impact ABS Shell for Kid Cycling/Skateboarding/Skate Inline Skating/Rollerblading IMPACT RESISTANCE - Material use the tough and ABS shelly EPS foam which help absorb the impact and protect the head during crash ,So its high safety performance. ADJUSTABLE (52 cm - 56cm / 20.47"-22") -Theres an adjustable rotary internal regulator at the back of the helmet, so that you can adjust it to fit your head ,The helmet is suitable Kid / Teens. VENTILATION - The adoption of specialized aerodynamic and ventilation design allow air go through the helmet which help increase the speed and keep stay cool. COMFORTABLE ACCESSORIES - Comfortable chin pads absorb sweat ,8 mm removable foam ,bring more comfortable experience . MULTI SPORTS GEAR - As ideal skateboard accessories, the cool helmets are widely used in skating activities such as skateboarding, roller skating, inline skate, scooter, rollerblading, longboard and two wheel electronic board. As play great protective function during these activities, the skateboard helmets are considered as the best helmets for skating activities. Whether your kiddo is racing BMX, kick scooter or just learning to skatboard or Inline roller, you are going to want to find good-fitting child-specific Helmet. Keep kids safe, ideal to wear when cycling, BMXing, skating and skateboarding Injection moulded ABS hard plastic shell for impact protection The helmet can be adjusted:52 - 56 cm(20.5-22 in) Adjustable straps with a quick and easy release buckle.